Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e98f09e4a89c2f9…

MALICIOUS

PDF

98.6 KB
MD5: 977cc5844659b3f08d561b07f82255e5 SHA-1: 48965fbfcddc827ea9c482fb32a00ed863c9c6e0 SHA-256: 5e98f09e4a89c2f9a21fd67f4fac27d4bfca2c99d8eb8a420a568766b4c2af41
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF document that contains an embedded XFA form and exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of TIFF images within XFA forms. This exploit is designed to execute a payload, indicated by the 'critical' heuristic firing and the presence of an embedded file. The ML classifier strongly flags this PDF as malicious, supporting the exploitation vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
69d97ed5a019e1e7c1bfd5a615c50b0559085d69ce120d05e7297fb9e4124093		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13442 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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